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argv, signum )) # turn off the LEDs ledshim. sleep ( delay ) # Catch exit signal and tidy up def catch ( self, signum, frame ): sys. NUM_PIXELS - 1 - x, 0, 0, 0 ) ledshim. sleep ( delay ) # Turn pixels off for x in range ( half_way ): ledshim. set_pixel ( half_way + x, r, g, b ) ledshim. set_pixel ( half_way - 1 - x, r, g, b ) ledshim. ![]() sleep ( delay ) # flash green for loaded r, g, b = 0, 255, 0 # Turn pixels on for x in range ( half_way ): ledshim. name () = PROCNAME : started = True break time. sleep ( delay ) # Check started for proc in psutil. catch ) started = False # wait for main prog to start while not started : # Turn pixels on for x in range ( half_way ): ledshim. NUM_PIXELS / 2 ) PROCNAME = "emulationstation" # Catch signals signal. set_clear_on_exit () # Wrap the fuctions in a class for help with signal handling class MyShim ( object ): def init ( self ): r, g, b = 255, 0, 0 delay = 0.05 half_way = int ( ledshim. #!/usr/bin/env python3 import signal import time import ledshim import psutil import sys import signal # Clear up on exit ledshim. BEST SMALL RASPBERRY PI EMU IMAGE HOW TOI have a spare SNES case and some other bits that I'm on the lookout for what to do next or how to improve the project :) This was my first "build" - I really enjoyed it, and really pleased with how it panned out. Happy to share that if someone finds this and wants it - just drop me a comment below. I also have a longer version which stays on and displays CPU usage until shutdown. If you use it and like it, drop me a comment and let me know :) BEST SMALL RASPBERRY PI EMU IMAGE CODEI've uploaded my code here if anyone wants to do something similar. the Pi0 is shutdown) the lights are turned off safely. I made a simple python script which runs on boot and displays pulsing red lights until it detects emulation-station is running, then flashes green. Test your connections, fix any issues and try again. If it still doesn't show up, then you may have a problem with your soldered joints. ![]() Which should show the address of the LED shim (0x75). If you have any problems, I'd start by ensuring the LED shim is detected over I2C: i2cdetect -y 1 When complete you'll have a directory in /home/pi with a bunch of helpful examples to get you started with lighting up some rainbows! Before you go any further I'd check that you can run some of these example scripts and all is OK. BEST SMALL RASPBERRY PI EMU IMAGE INSTALLNext install the Pimoroni LED shim library and all its dependencies with: curl | bash Once logged in, execute "passwd" to change it. BEST SMALL RASPBERRY PI EMU IMAGE PASSWORDSSH onto the Pi0 ssh default password is "raspberry". If you get stuck - go back to the RetroPie/Emulation-Station docs or give it a quick google. I'm going to assume you've now booted up the Pi0, set it all up and enabled WiFi. You can also setup WiFi from the Emulation-station menus, so it's up to you really how you do it! Just don't forget to connect to the computer via the data USB port on the Pi0, not the power one! I do this because it makes it simple to connect the Pi0 to your computer via USB and ssh onto it - particularly before you've setup wifi for the first time.
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